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Electronics Projects - Home

Audio Related

Advent Speaker Repair
Large Advent speaker (circa 1979), foam surround, crossover capacitor and resistor replacement information and pictures, crossover schematic diagrams, and Advent sales brochure and user manual.

Click and Pop Filter Symmetric Sound Systems PS-1
Symmetric Sound Systems PS-1 audio pulse swallower kit, This Kit was featured in Radio Electronics magazine in the 1980s.

RIAA Stereo Phono Preamp
Home built stereo riaa phono preamp used to interface a record player's magnetic cartridge output to the line level input of computer sound cards, and other modern audio devices without phono inputs.

Surfman
Surfman, homebuilt electronics project designed to create the sound of rain, crashing surf, or unmodulated pink noise, Designed by John Simonton and featured in the August 1992 issue of Radio Electronics and Electronics Now combined magazine.


Electronics Test & Project Creation

Audio Frequency Signal Generator
This audio frequency generator project was featured in the March 1984 issue of Radio Electronics magazine and is based on the XR-2206 function generator ic.

Automatic Coil Winder
My build of the computer controlled automatic coil winder project that was featured in the June 2005 issue of Nuts and Volts magazine.

Automatic Coil Winder - PIC Microcontroller Based Control Unit
My first addition to the Automatic Coil Winder eliminating the need for a computer with parallel port to run the winder.

Automatic Coil Winder - PIC18F4550 Based Control Unit
This is the 2nd version of my PIC based Automatic Coil Winder Control Unit. It is based on the PIC18F4550 microcontroller and I paired it up with two LiniStepper driver boards.

Automatic Coil Winder - Arduino Based Control Unit
Page Under Construction - Arduino based automatic coil winder made with 3d printed parts.

Cyclone PCB Factory version 2.1
Page Under Construction - Printed circuit board milling machine made from 3d printed parts.

PIC Microchip Modules
A collection of home-built PIC chip breadboard modules, getting started programming a PIC chip with a JDM based hardware programmer, and a sound command input value to musical note table I created.

Test Bench Power Supply
My recently updated homebuilt work bench power supply.


Energy Related / Solar

Solar Book with two Chronar panels
Homebuilt Solar Book using two surplus 6" X 12" Chronar thin film solar panels.

Solar Briefcase with six Chronar panels
Six Chronar 6" x 12" solar panel built into a wood case.
All panels electrically switchable into various series and parallel configurations.

Solar Panel - Chronar
Chronar 6" x 12" solar panel and characterization data.

Solar Panel Testing Shunt
Solar Panel Testing Shunt for measuring the power output of small solar panels.

Solar Shunt Regulator 100 Watt
Page Under Construction -100 watt solar shunt regulator for 12 volt solar.

Switching Regulator LM2575T-ADJ
LM2575 step down switching regulator circuit and efficiency data table.


Miscellaneous Electronics Projects

Aquarium Timer
Schematic, pictures and information for my 15 minute aquarium filter and air pump shutoff timer for fish feeding.

88 Dakota ECM Repair
1988 Dodge Dakota ECM (Computer) Repair, ECM ignition coil drive transistor and suppression capacitor replacement.

GPS USB Mini Jack - Hack / Repair
Replacing or bypassing a broken GPS Mini USB Jack / Power Connector.

Maytag Neptune 5500 Washer Repair
Repair information and photos of damaged control board components,and schematic drawing of the motor control board C phase drive circuit.

Phone to Sound Card Interface for Skype
Homebuilt phone to computer sound card interface for Skype.

Solid State Triac Relay
A triac solid state relay I built to replaced a failed mechanical relay used to power an inline HVAC duct booster.


Musical Instrument Related

Bass / Guitar Headphone Amp
This is my Bass / Guitar Headphone Amp build of Craig Anderton's Guitar Headphone Amp from his Electronics Projects for Musicians book.

Electric Bass / Guitar Headphone Amp with Stereo Auxiliary Input
I designed a DIY musical instrument headphone amp with a stereo auxiliary input to mix the audio of a MP3 player, laptop computer, radio, or other device with an electric bass or guitar.

McTube II Preamp
My build of Fred Nachbaur's Real McTube II musical instrument overdrive / distortion preamplifier.

Music Effects Boards
Bass Fuzz, Compressor / Limiter and the Phase Shifter projects from the Craig Anderton's "Electronics Projects for Musicians" book.

Practice Play Along
The Practice Play Along mixes a musical instrument with your stereo system. This is a Craig Anderton design from his Electronics Projects for Musicians book.


Other Electronics Stuff

Electronics Related Websites
Information, parts suppliers, etc.

LR-505 Transistor Specifications
Vintage Lafayette LR-505 ( 505 ) germanium transistor and specifications.

Minebea Stepper Motors
Part number decoding & stepper motor specifications, Circa 1999

Minebea Stepper Motor Winding Wiring Diagrams
Diagrams with winding wiring color codes, Circa 1999

Photo Cell Cadmium Sulphide 276-116 Data Sheet
Data sheet includes photocell specifications, graphs of the photoelectric characteristics, and circuit ideas.

Radio Shack Transistor Application & Substitution Information
From the 1974 Radio Shack catalog.

Radio Shack Transistor Specifications
From the 1976 Radio Shack catalog.

SCR 276-1020 Data Sheet
Includes specifications, silicon controlled rectifier theory, typical voltage - current characteristics graph, and circuit ideas.



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